Multiple choice Directions: Choose the option which is not the synonym of the given word. Fail Backfire Malfunction Malefactor Flop Reveal answer Fill a bubble to check yourself C Correct answer Explanation Fail means to be unsuccessful or not work. Backfire, malfunction, and flop all describe failure or unsuccessful outcomes. Malefactor means a criminal or wrongdoer - a person who commits harm, not the failure itself.